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Forward Citations = 42

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11 inventors (with patents filed for the assignee):

Takao Tsukamura (2 out of 2 patents)

Makoto Inoue (1 out of 99 patents)

Hirofumi Irie (1 out of 2 patents)

4. Youichi Kobayashi (1 out of 2 patents)

5. Kazuo Kajiwara (1 out of 7 patents)

6. Keisuke Nakagaki (1 out of 1 patent)

7. Eiichiro Ikuno (1 out of 1 patent)

8. Tomoki Yoshizumi (1 out of 1 patent)

9. Mitsuo Sasai (1 out of 1 patent)

10. Kiyozi Tomikawa (1 out of 1 patent)

11. Tetuo Kubota (1 out of 1 patent)

6 patents: Sort by Forward Citations

1. 4994129 - Method and apparatus for temporarily covering openings of containers (1991-02-19),

2. 4705184 - Metal containers with seam holding end closure thereon (1987-11-10),

3. 4543025 - Metal containers - their manufacturing methods (1985-09-24),

4. 4540323 - Metal containers and their manufacturing method and apparatus (1985-09-10),

5. 4392295 - Method and apparatus for forming drum seam (1983-07-12),

6. 4235359 - Apparatus for welding fittings to a container (1980-11-25),

Nittetsu Steel Drum Co., Ltd. has been specializing in manufacturing steel drums for over 70 years. With a commitment to quality and innovation, we provide a wide range of steel drum solutions for various industries including chemicals, oils, and food products. Our company's state-of-the-art facilities and experienced team ensure that our steel drums meet the highest standards of durability, reliability, and safety.

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Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

6 Patents

#2,212 in Tokyo

#5,843 in Japan

Tokyo, Japan

Nittetsu Steel Drum Co., Ltd.